Fuel-saving device for furnaces



- N. J. RUSSELL FUEL SAVING DEVIQ'E FOR FURNACES Filed Jan. 12 1923 moon9. RUSSELL, B CHIG'AGQ,

rum-some DEVICE roe. nonsense.

Application fled January 12, 1823. Serial Silo. $153,862.,

or vernents in furnoces, hut porticnlerl to devices for feeding air to:hirn, en es neciolly to that type of turn known sohoiler furnaces,wherein n, holler having e pliirelitof speced dues for the essoge oidomes, eat and goses from the re-hox or firepot, is employed, and itconsists in oertoin peculiarities end novel features of theconstrootion, combination and arrangement of the verious parts thereofes will he here innfter more specifically claimed.

Broedly speeliing, the object of the inreno tion is, the provision ofcertain improve ments end devices applicable to or used in connectionwith boiler-dues or firetloes of e furnace, tor eugmenting the eifectivepow-t er of fuel "for heating purposes, end else for the generotion ofsteam.

llflore specifically, an object of the invention is to provide at devicefor outomoticelly admitting, heating and dischor ing oir into furnaces,in 511 e menner that the supply of air to the finnocee, will, throughthe medium of the device, he heated to e hi h degree of temperetune, insuch o condition discharged or distrihuh ed in the fire-hex or potthereoilto corneringle with the combustible and volatile gases emenotingfrom the burning fuel, where sold heated air and oxygen will he utilizeto increase from it given amount of luel, the combustion of thecombustible gases, or of the flee carbon released during the horning ofsuch fuel, thereby molding to o, morked degree the formation cl smoke,yet attaining o maximum amount of host units from the fuel.

While I have shown in the eccompenying drawing device embodying myimprovements. applied to o horizontally mounted hoiler and willhereinafter so describe it, yet it Will become obvious from thefollowing description and explanation, thet the device is applicable toboilers Whether their dues are of the upright, diagonally disposed, orhorizontal type, and for this reason, l do not desire to he limited,except where so mentioned, in the nnnexed'cleinis, to only perticulertype of holler In the accompanying drawing,----

Fig. 1 o cross-sectional token on line 1-4 of Fig. 2, as indicated bythe arrows, of e portion of o boiler, illustroting the some equippedwith e fool sewing device emhodying the Fig, 2 is e longitudinal controlsectionel' View through the i'nrnooe end h 16,

enlarged longitudinal sectional View oi one of the hoiler fines, showingit the heel device.

Corresponding nnnoerels of reference refer to like cits throughout thediflerent views of the v The furnace cnsin as ewhole is designoted bythe owners 5, end ee nsuel, hoe at its front end e fire-hon 6, end. atits rear end eoother cheniher 2', which will herein he termed thecombustion chamber, from which lends on outlet line or pipe 8 fordischarge of smoke-end nnconsorned porticles of combustion. The fire-hos6 is of course provided no usual, with o grate not shown, and sold, hexor chamber is loceted ot the front end of the boiler 8 which ishorizontally mounted in the usual or any preferred troy Within-the cosinbetween the chonimrs ll end 1?, and hes es shown, e plurality oflireilnes l which speced from one another and surrounded by we torwithin the lJ-U'llGF. @ne of the dues ll, hy preference lmetedeentrollywith respect to group of dues, its rear end closed in any suitablemanner but usually lo means of a lug 10 of-eshcstos or some 0t ere1ihstentioll r non-combustible materiel.

Extended through the upper portion of the furnace casing reerwerdly ofthe rear end of the holler 8 into the combustion Z s on eir intake pipe11 which has connecled on moons of a coupling 12 hr ech ni e 13 which isextended throng e iisgoosed orifice in the plug or closure end. hasmounted on its end with in the line 9 an annular chamber casing 142 ofless diameter then the inner diameter of the said fine. The casing 1 hasextended centrally from its front end a tube 15 which communicates atits front end with another chamber casing it? "which is also annular inshape and of less diameter than the inner diameter of the flue 9 inwhich it is loceted.

The seeing is provided in its periphery with one or more openings16fland in. its front wall with one or more openings 17 for thedischarge of air fromsaid casing into the flue 9 in which it is located.The casin 16 at the front end of the flue 9 is provide with a centraldischarge opening 18 and around said opening with a concave depression19 for the purpose of causing air discharged through the opening 18 tobe spread in a circular volume.

As is more clearly shown in Fig; 3 of the drawing, the casing 16 is ofconsiderably larger capacity than the casing 14 and is located withinthe tube 9 in such a way that its front end is about flush with thefront end of the flue 9 and sothat an annular space is provided betweenthe annular wall of the casing 16 and the inner surface of said flue.The rear wall of the casing 16 occupies a position at right angles tothe flue 9 and thus provides an abutment against which air travelingforwardly or in the direction indicated by the arrows in Fig, 3, willimpinge and to a certain extent be impeded in its passage through thespace between the casing 16 and flue. The casing 14 is as shown locatednear the rear end .of the flue 9and will be supplied with at mosphericair through the intake pipe 11 and branch pipe 13, which as beforestated,

is extended through an opening in the clo-.

sure 10 and as shown, supports the casing in such a way that its annularwall will be spaced from the inner surface of the flue 9 in which thedevice is located.

The operation of the device is simple and as follows:

The draft through all of the fines 9 of the boiler with the exception.of that one or those equipped with the device, for it will be understoodthat I may employ my improved device in one or more of the boiler flu-eswill be, as usuahfrom the fire-box 6 rearwardly through the fines, butor flues equipped with the device has it or their rear ends closed, itis manifest that the draft through such equipped flue or flues,

will be reversed as the flames and heated gases escaping rearwardly fromthe firebox 6 through the dues surroundingthe fine or lines equippedwith the device, will create a forward suction at the front end or endsof the equipped fines and that thus a forwardly pulling draft will besupplied to the front ends of the equipped flue or lines.

This action together with atmospheric pressure, will cause air to enterthe outer end of the intake pipe 11 and pass into the primary expansionchamber 14 where it will become heated and expanded by reason of theheat of the water surrounding the fines, as well as by reason of theheat in the combustion chamber 7 and also by reason of the heat impartedfrom the surrounding flues When thus heated and expanded, air will passas the flue 16 and from thence -w1ll pass out through the annular spacebetween the casin 16 and flue 9 with considerable force and in a circular volume.

During this operation, part of the-volume of air from the chamber 14will pass through the tube 15 into the casing 16, where it will befurther heated and expanded and from whence it will pass through theopening 18 into the fire-box. As the opening 18 is surrounded by aconcave de ression 19, this central volume of air wil be caused tospread out in circular form and intersect the annular or circular volumeof air discharged between the casing 16 and front end of the flue.

fire-box and cause commingling of the heated air and combustible andvolatile gases emanating from the burning fuel,

thus utilizing the air and oxygen to increase 1 from a given amount offuel the of the combustible gases,

combustion While I have shown in the drawing,the

air intake pipe 11 as being vertically ex-.

tended through the top of the'furnacc and in communication at its lowerend with one 'of the fines of the boiler, yet'it is manifest that theintake pipe may be extended through one of the side walls of the furnaceor through the rear end wall thereof and conneote to one of the fiues,and that the same results will be afforded.

It will further be understood that while I prefer to utilize one or moreof the fire fiues of a boiler in connection with my improved device, yetI do not wish to be limited thereto, as a fire flue of the furnace whichmay be suitably located, may be employed as a receptacle for the exansion casin s and the connecting pi e t erefor an closed in the samemanner as when the device is used in connection with a boiler flue andas above described.

Having thus fully described my invention,

The intersection of these volumes of air will set up agitation in theave its end opposite t e fire-box what I c aim as being new anddesire tosecure by Letters Patent is--' 1. In a device of the classdescribed,'the combination with a furnace having a firebox, of a conduithaving one of its ends open and its other and closed, the o en end ofsaid 7 conduit being adjacent the re-box, an air intake pipecommunicating at one of its ends with the conduit near its closed endand having its other end disposed for the intake of air, an aperturodcasing located in the "conduit near its closed end in communication withsaid pipe, another casing 10 open end of the conduit end be fordiscborging eir' forwardly tl rein, end 2 pipe connecting the saidcnsings.

52, ln s device of the clues described, the combination with e, furnacehaving a firebox of e conduit beving one of its ends ofen its other endclo%d, the c en en of siiid conduit being adjacent the re-box, an sirintslre pipe cornmuniccting at one of its ends with the conduit near itsclosed end and having its other end disposed for the intelre oi err, onupertured casing located in the conduit nest its closed end in commuuicstion with said pipe, the said casingbeing spaced from the wells of theconduit, enotlicr cosin located in the open end of the conduit en havingmeans for discharging nir forwardly therefrom said. last named cesingbeing spaced from the wells of the conduit sud having communication withthe first nsmed casing.

In n device of the class described, the combination with c furnacehaving a. firebox of boiler rovided with o plurality of es and locatedwith one of its ends adjecen't tire fire-loos, st leest one off saidflues having its end/opposite the fire-box closed sir intsise pipecommunicating st one oi its ends with said. flue near its closed end andhaving its other end extended through the iurnnos cusing for the intakeof all, on spertnred cnsing located. in said t'iue neer its closed endin communication with said flips, stud cssing being spewed from the weof the line, snotlier casing located in the open or the due and bravingmeans for disqing sir forwsrdly therefrom, said lest cl. casing beingspaced from the wells of i. end boving communicstion with the st namedcausing.

chamber at its other end, of a. boiler provided with a olurality offlues and located lon itudinall between said fire-box and the com ustionc amber at least one of said flues having its end adjacent thecombustion chamber closed, an air intake pipe communicating at one ofits ends with said flue near its closed end and having its other endextended through the furnace casing for the intake of air, an aperturedcasing located in said flue near its closed end in communication withsaid pipe, said casing being spaced from the walls of the flue anothercasing located in the end of the due adjacent the firebox end linvincentrally in its front wall a forwardly cred o ning, said last namedcasing being spec from the walls of said flue and having communicationwith the first named casing.

5. A device of the class described, includinc in combination with afurnace having c Ere box at one of its ends and a combustion chamber atits other end, a. boiler provided with a plurality of longitudinallydisposed flues, the said boiler being longitudimolly located in thefurnace wlth its ends spaced from the inner end walls of the fur" zones,an air intake pipe extending into the end of one oi said fines adjacentthe said combustion clisnober and having its other end extended throughthe furnace wall for the intake of air, and means closing the end ofsaid flue adjacent the combustion chamher around said pipe but leavi theinner end 01E said pipe open for the discharge of sir into snid flue.

sensors J. RUSSELL.

